Agriophyllum squarrosum screening device
By designing a sandmi screening device including a first screen and an auxiliary screen, the problem of sandmi failure to completely break up during the vibration screening process is solved, the full separation of sandmi and sand is achieved, and the quality of sandmi is improved.
Patent Information
- Application Number
- CN202421656892.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In the prior art, sand rice cannot be completely dispersed during the vibration screening process, resulting in the mixing of sand and sand rice, affecting the quality of sand rice.
A sandmi screening device is designed, including a base, a screen frame and a screen assembly. The screen assembly consists of a first screen and an auxiliary screen. The auxiliary screen forms a movable cavity, encompassing the movement trajectory of the material on the first screen, and extending the vibration screening time of the sand.
By extending the vibration screening time of sand rice, we ensure that sand rice can be fully separated from sand, and the quality of sand rice is improved.
Smart Images
Figure CN222830110U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of screening devices, and in particular to a sand and rice screening device. Background Art
[0002] Sand rice, also known as sand millet, Dengxiang, Dengxiang, Dengxiang, Dengsu and Tribulus terrestris, mainly grows in bare patches of deserts, semi-fixed and fixed sands in arid and semi-arid areas. It can be used as food because of its spleen and stomach strengthening, anti-oxidation and blood sugar lowering effects, and can also be used as feed.
[0003] Since rice shavings grow in desert areas, they will be mixed with sand after being collected, so the sand needs to be screened out. In related technologies, a swing screen is generally used for vibration screening. Through high-speed vibration, the lumps and larger particles are broken up, and the fine sand falls under the screen and is discharged through the discharge port below the screen, while the rice shavings are discharged from the discharge port above.
[0004] However, the area of the oscillating screen is limited, and due to the high vibration speed of the oscillating screen, some sandy rice that has not been completely broken up will be mixed with sand and directly discharged through the discharge port above the screen, affecting the quality of the sandy rice. Utility Model Content
[0005] The embodiment of the present application provides a sand and rice screening device, which can improve the quality of the sand and rice screened out by a swing vibrating screen.
[0006] The present application provides a sand rice screening device, comprising:
[0007] A base, configured with a vibration assembly;
[0008] a screen frame connected to the base, wherein a receiving cavity is formed in the screen frame; and
[0009] At least one screen assembly is disposed in the accommodating cavity, and the screen assembly comprises:
[0010] A first screen is arranged along a vertical direction to separate the accommodating chamber into a first working space located at an upper end of the first screen and a second working space located at a lower end of the first screen; and
[0011] The auxiliary screen is arranged at the upper end of the first screen and has an active cavity. The upper end and the lower end of the active cavity are both opened. The auxiliary screen is provided with a feeding port to connect the active cavity and the first working space.
[0012] In some embodiments, the auxiliary screen comprises:
[0013] Two mounting frames, the two mounting frames are spaced apart in the vertical direction; and
[0014] A second screen is disposed between the two mounting frames and fixed relative to the mounting frames;
[0015] Wherein, the mounting frame located at the lower layer is connected to the first screen.
[0016] In some embodiments, the auxiliary screen is ring-shaped.
[0017] In some embodiments, the diameter R1 of the auxiliary screen is not less than one third of the diameter of the first screen R2.
[0018] In some embodiments, along the direction in which the first screen throws out the material, the auxiliary screen has a first end for throwing out the material, and a second end forming the material passing port with the first end;
[0019] The screen frame is provided with a plurality of discharge ports, any of which is connected to the first working space or the second working space, and along the first screen material discharge direction, the discharge port has a first side wall close to the material discharge side and a second side wall away from the material discharge side;
[0020] The sand and rice screening device also includes a connecting piece, one end of which is connected to the screen frame and is arranged adjacent to the second side wall of the feed opening, and the other end of the connecting piece is connected to the first end of the auxiliary screen.
[0021] In some embodiments, two screen assemblies are provided, and the two screen assemblies are distributed vertically at intervals. The sand rice screening device also includes a guide plate, which is located between the two first screens. The guide plate forms a guide channel, and the cross-section of the guide channel gradually decreases along the vertical direction.
[0022] In some embodiments, the axis of the flow guide channel is colinear with the axis of the screen frame.
[0023] In some embodiments, the opening area of the upper end of the guide channel is not less than the cross-sectional area of the first screen;
[0024] And / or, the opening area of the lower end of the guide channel is not larger than the opening area of the upper end of the active cavity.
[0025] In some embodiments, the distance d between the lower side wall of the guide plate and the upper side wall of the auxiliary screen located at the lower layer does not exceed 5 cm.
[0026] In some embodiments, the screen frame includes a frame body and a cover body, the accommodating cavity is formed between the cover body and the frame body, and the cover body is detachably connected to the frame body.
[0027] The sand rice screening device based on the embodiment of the present application includes at least one screen assembly, and the screen assembly includes a first screen and an auxiliary screen. The movable cavity formed by the auxiliary screen enlarges the movement trajectory of the material on the first screen, which is equivalent to slowing down the time for the sand rice to be discharged through the discharge port, allowing the sand rice to be fully vibrated and screened, thereby improving the quality of the sand rice after the final screening. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.
[0029] Figure 1 A schematic diagram of the structure of a sand and rice screening device provided in an embodiment of the present application;
[0030] Figure 2 A schematic cross-sectional structure diagram of a sand and rice screening device provided in an embodiment of the present application;
[0031] Figure 3 A schematic diagram of the top view of the screen frame of the sand and rice screening device provided in an embodiment of the present application;
[0032] Figure 4 A schematic diagram of the structure of the auxiliary screen of the sand and rice screening device provided in an embodiment of the present application.
[0033] Reference numerals in the figure: 10, base; 11, vibration assembly; 20, screen frame; 20a, accommodating chamber; 201a, first working space; 202a, second working space; 20b, discharge port; 201b, first side wall; 202b, second side wall; 21, frame; 22, cover; 30, screen assembly; 31, first screen; 32, auxiliary screen; 32a, movable chamber; 32b, feed port; 321, mounting frame; 322, second screen; 323, first end; 324, second end; 40, connecting piece; 50, guide plate; 50a, guide channel. DETAILED DESCRIPTION
[0034] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0035] Because there is a technical problem in the related art that the sandy rice is not completely broken up and is mixed with sand and discharged directly through the discharge port 20b above the screen, the quality of the sandy rice is affected.
[0036] To solve the above technical problems, please refer to Figure 1-2 The present application proposes a sand and rice screening device, including a base 10, a screen frame 20 and at least one screen assembly 30. The screening device of the present application adopts a circular swing screen. The screen surface of the swing screen can be fully utilized. There is no dead corner in the screen frame 20. As long as the material is screened in the screen machine, it can contact the screen surface. The screening accuracy is high and fine sand can be screened out. The circular swing screen is a prior art, so no further explanation is given here.
[0037] The base 10 is provided with a vibration assembly 11, which generally includes a motor, an eccentric shaft or an eccentric member and other structures. Through eccentric motion, the force is transmitted to the screen frame 20, thereby driving the screen frame 20 to produce a swinging motion. The vibration of the swing screen is a prior art, so its principle and connection relationship will not be explained in detail here.
[0038] The screen frame 20 includes a frame body 21 and a cover body 22. A accommodating chamber 20a is formed between the cover body 22 and the frame body 21. The upper end of the accommodating chamber 20a is connected to the first working space 201a. The setting of the cover body 22 can prevent dust from splashing during the vibration screening of sand and rice, which not only pollutes the environment but also increases the difficulty of cleaning.
[0039] The cover body 22 is detachably connected to the frame body 21 , and specifically can be connected by snap-fitting, or the cover body 22 can be hinged to the frame body 21 , or other detachable connection methods in the prior art, which will not be explained here.
[0040] In the prior art, during the vibration screening process of the sandy rice on the rocking screen, the sandy rice mixed with the sand will gradually move toward the edge of the screen due to the centrifugal effect, so that most of the sandy rice will eventually move along the inner wall of the rocking screen and finally be discharged through the discharge port 20b (the overall volume of the sandy rice is larger than that of the fine sand). Since the sandy rice is mixed with some sand, the discharged sandy rice may also be mixed with sand, which ultimately affects the quality of the sandy rice.
[0041] See also Figure 2 In order to solve the above technical problems, a accommodating cavity 20a is formed in the screen frame 20, and the screen assembly 30 is arranged in the accommodating cavity 20a. The screen assembly 30 includes a first screen 31 and an auxiliary screen 32. Along the vertical direction, the first screen 31 divides the accommodating cavity 20a into a first working space 201a located at the upper end of the first screen 31 and a second working space 202a located at the lower end of the first screen 31. The auxiliary screen 32 is arranged at the upper end of the first screen 31 and has an active cavity 32a. The upper and lower ends of the active cavity 32a are both opened. A feed port 32b is provided on the auxiliary screen 32 to connect the active cavity 32a and the first working space 201a.
[0042] In this way, in the specific implementation stage, the sand mixed with the sand can be placed in the active chamber 32a. During the vibration screening process of the swing screen, the sand entering the active chamber 32a will first move to the side wall of the auxiliary screen 32 under the action of centrifugal force, then move along the side wall of the auxiliary screen 32, and then enter the first working space 201a through the feeding port 32b on the side wall of the auxiliary screen 32, and then move along the inner wall of the screen frame 20, and finally the sand is discharged through the discharge port 20b connected to the upper first working space 201a. Under the screening action of the first screen 31, the sand is discharged through the discharge port 20b connected to the lower second working space 202a. Figure 3 From the figure, the arrow points to the movement trajectory of the sandy rice. Obviously, by setting the auxiliary screen 32, the vibration screening time of the sandy rice on the first screen 31 can be effectively increased. In this way, the sandy rice can be effectively separated from the sand, thereby improving the quality of the sandy rice after discharge.
[0043] Generally speaking, in order to ensure that the sand is in relatively dispersed contact with the inner wall of the auxiliary screen 32 during vibration screening, the auxiliary screen 32 is placed in the center of the first screen 31. In this way, the sand mixed with sand can be evenly dispersed during centrifugal motion, thereby avoiding uneven vibration screening of the sand, which may lead to uneven quality of the screened sand.
[0044] In the present embodiment, there is at least one screen assembly 30, that is, the screen assembly 30 may be one, two, three, four, etc., and the following will be exemplified by taking one and two screen assemblies 30 as examples.
[0045] When there is only one screen assembly 30 , it is mainly used for sandy rice that has been preliminarily screened. At this time, the first screen 31 can only filter fine sand, while the sandy rice remains on the first screen 31 .
[0046] When there are two screen assemblies 30, the two screen assemblies 30 are distributed in a vertical interval, the mesh sizes of the first screens 31 in the two screen assemblies 30 are different, and the mesh size of the first screen 31 located in the upper layer is smaller than the mesh size of the first screen 31 in the lower layer. Therefore, the filtering ability of the first screen 31 in the lower layer is stronger and can filter out smaller fine sand or sandy rice. In this way, when there are two screen assemblies 30, graded screening can be performed. For example, the top layer is sandy rice with a larger volume, the middle layer is sandy rice with a relatively smaller volume, and the bottom layer is fine sand with the smallest volume, thereby obtaining sandy rice of different qualities.
[0047] In order to ensure that the sandy rice in the middle layer can also be fully vibrated and screened, the sandy rice screening device in the embodiment of the present application further includes a guide plate 50, the guide plate 50 is located between the two first screens 31, and the guide plate 50 forms a guide channel 50a. In the vertical direction, the cross section of the guide channel 50a gradually decreases. Figure 2 As shown, the vertical section of the guide plate 50 is an isosceles trapezoid, so that the sand filtered from the first screen 31 on the upper side can enter the middle of the lower first screen 31, thereby increasing the vibration screening time of the sand in the middle layer, so that the sand in the middle layer can be fully separated from the sand.
[0048] In some embodiments, the axis of the guide channel 50a is colinear with the axis of the screen frame 20. In this way, the sand that enters the first screen 31 of the lower layer through the guide channel 50a is also mainly concentrated in the middle of the first screen 31, thereby ensuring that the sand can be evenly dispersed on the first screen 31 of the lower layer, avoiding the sand from concentrating in one direction, thereby affecting the vibration screening effect of the sand.
[0049] Please continue reading Figure 2 In order to ensure that the sand passing through the upper first screen 31 can be mainly concentrated in the active cavity 32a of the auxiliary screen 32 on the lower first screen 31, the upper opening area of the guide channel 50a is not less than the cross-sectional area of the first screen 31, and the lower opening area of the guide channel 50a is not larger than the upper opening area of the active cavity 32a.
[0050] In this way, the sand filtered by the first upper screen 31 will flow out through the guide channel 50a, and when the opening area of the lower end of the guide channel 50a is not larger than the opening area of the upper end of the active cavity 32a, the outlet area of the lower end of the guide channel 50a is limited, so that most of the fallen sand can fall into the active cavity 32a, thereby increasing the vibration screening time of the sand in the middle layer, so that the sand in the middle layer can be fully separated from the sand.
[0051] In some embodiments, the distance d between the lower side wall of the guide plate 50 and the upper side wall of the auxiliary screen 32 located in the lower layer does not exceed 5 cm, and d can be 5 cm, 4 cm, 3 cm, 2 cm, etc. In the vertical direction, the lower side wall of the guide plate 50 can be higher than the upper side wall of the auxiliary screen 32 located in the lower layer, or the lower side wall of the guide plate 50 can be lower than the upper side wall of the auxiliary screen 32 located in the lower layer. In this way, on the basis that the opening area of the lower end of the flow channel is not larger than the opening area of the upper end of the active cavity 32a, the sand filtered by the upper first screen 31 can basically fall into the active cavity 32a of the lower auxiliary screen 32, thereby extending the vibration screening time of the sand in the middle layer on the lower first screen 31, so that the sand in the middle layer can be fully vibrated and screened and separated.
[0052] In some of these embodiments, see Figure 4 The auxiliary screen 32 includes two mounting frames 321 and a second screen 322. The two mounting frames 321 are arranged at intervals in the vertical direction. The second screen 322 is arranged between the two mounting frames 321 and fixed relative to the mounting frames 321. The mounting frame 321 located at the lower layer is connected to the first screen 31. The mounting frame 321 provides the second screen 322 with an installation position. The mounting frame 321 and the second screen 322 can be fixedly connected together by welding or bolts.
[0053] In this embodiment, if Figure 4 As shown, along the vertical direction, the width of the second screen 322 is greater than the width of the mounting frame 321. Since the second screen 322 is a mesh design, the shaggy rice mixed with sand collides with the side wall of the second screen 322 under the action of centrifugation, and the shaggy rice can be separated from the sand under the action of the collision force. The separated shaggy rice and sand can also pass through the mesh of the second screen 322. The sand falls into the lower space through the first screen 31, and the shaggy rice can be quickly discharged through the discharge port 20b.
[0054] See also Figure 3 In this embodiment, the auxiliary screen 32 is annular and has a notch. Thus, the movement trajectory of the sand is relatively gentle and the sand can move along the inner wall of the auxiliary screen 32, thereby preventing the sand from piling up and affecting the screening efficiency.
[0055] In order to improve the moving path of the sand on the first screen 31 so that the sand can be fully screened with the sand, the diameter of the auxiliary screen 32R1 is not less than one-third of the diameter of the first screen 31R2. Specifically, R1 can be equal to one-third of the diameter of R2, or two-thirds of the diameter of R2. As a preferred embodiment, R1 is between one-third R2 and two-thirds R2, which can improve the moving trajectory of the sand without affecting the normal movement of the sand outside the active cavity 32a.
[0056] Please continue reading Figure 2-3 In the vertical direction, the lower end of the auxiliary screen 32 can be connected to the first screen 31, for example, by gluing, welding or bolting, which will not be explained here. The auxiliary screen 32 can also be fixedly connected to the screen frame 20 through a connecting member 40. In this embodiment, along the direction of the material thrown out of the first screen 31, as shown in FIG. Figure 3 As shown, the movement trajectory of the sand is clockwise, and the auxiliary screen 32 has a first end 323 for throwing out the material, and a second end 324 forming a material outlet 32b with the first end 323;
[0057] The screen frame 20 is provided with a plurality of feed openings 20b, any of which is connected to the first working space 201a or the second working space 202a. Along the material ejection direction of the first screen 31, the feed opening 20b has a first side wall 201b close to the material ejection side and a second side wall 202b away from the material ejection side.
[0058] The sand and rice screening device also includes a connecting member 40 , one end of which is connected to the screen frame 20 and is disposed adjacent to the second side wall 202 b of the feed opening 20 b , and the other end of the connecting member 40 is connected to the first end 323 of the auxiliary screen 32 .
[0059] In this embodiment, the connecting member 40 not only plays a connecting role, but also fits the first screen 31 along the vertical direction. In this way, the connecting member 40 can ensure that the sand in the active cavity 32a will not be discharged from the discharge port 20b before being fully vibrated and screened when flowing out of the active cavity 32a through the feeding port 32b. That is, through the setting of the connecting member 40, it can be ensured that the sand can be fully vibrated and screened on the first screen 31.
[0060] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.
[0061] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A sandy rice screening device, characterized in that: include: A base, configured with a vibration assembly; A screen frame connected to the base, wherein a receiving cavity is formed in the screen frame; as well as At least one screen assembly is disposed in the accommodating cavity, and the screen assembly comprises: A first screen is arranged along a vertical direction to separate the accommodating chamber into a first working space located at an upper end of the first screen and a second working space located at a lower end of the first screen; and The auxiliary screen is arranged at the upper end of the first screen and has an active cavity. The upper end and the lower end of the active cavity are both opened. The auxiliary screen is provided with a feeding port to connect the active cavity and the first working space.
2. The sandy rice screening device according to claim 1, characterized in that: The auxiliary screen comprises: Two mounting frames, the two mounting frames are spaced apart in the vertical direction; and A second screen is disposed between the two mounting frames and fixed relative to the mounting frames; Wherein, the mounting frame located at the lower layer is connected to the first screen.
3. The sandy rice screening device according to claim 1, characterized in that: The auxiliary screen is ring-shaped.
4. The sandy rice screening device according to claim 3, characterized in that: The diameter R1 of the auxiliary screen is not less than one third of the diameter of the first screen R2.
5. The sandy rice screening device according to claim 1, characterized in that: Along the direction in which the first screen throws out the material, the auxiliary screen has a first end for throwing out the material, and a second end forming the material passing port with the first end; The screen frame is provided with a plurality of discharge ports, any of which is connected to the first working space or the second working space, and along the first screen material discharge direction, the discharge port has a first side wall close to the material discharge side and a second side wall away from the material discharge side; The sand and rice screening device also includes a connecting piece, one end of which is connected to the screen frame and is arranged adjacent to the second side wall of the feed opening, and the other end of the connecting piece is connected to the first end of the auxiliary screen.
6. The sandy rice screening device according to claim 1, characterized in that: The two screen assemblies are provided with two, and the two screen assemblies are distributed in a vertical interval. The sand rice screening device also includes a guide plate, and the guide plate is located between the two first screens. The guide plate forms a guide channel, and the cross-section of the guide channel gradually decreases along the vertical direction.
7. The sandy rice screening device according to claim 6, characterized in that: The axis of the flow guide channel is colinear with the axis of the screen frame.
8. The sand and rice screening device according to claim 6, characterized in that: The opening area of the upper end of the guide channel is not less than the cross-sectional area of the first screen; And / or, the opening area of the lower end of the guide channel is not larger than the opening area of the upper end of the active cavity.
9. The sand and rice screening device according to claim 6, characterized in that: The distance d between the lower side wall of the guide plate and the upper side wall of the auxiliary screen located at the lower layer does not exceed 5 cm.
10. The sandy rice screening device according to claim 1, characterized in that: The screen frame comprises a frame body and a cover body, the accommodating cavity is formed between the cover body and the frame body, and the cover body is detachably connected to the frame body.